php基础笔记 Arrow difference

/***************************by
garcon1986********************************/
<?php
// -> 是指对象的方法或者属性
class Cart{
public function add_item($a,$b){
echo $a+$b.'<br>';
}
}
//$cart = new Cart; 两句意义相同
$cart = new Cart();
$cart->add_item("10", 1);
// => 数组的元素赋值
//键值one对应的值是1, 键值two对应的值是2,键值对应的值是3.
$a = array("one"=>1, "two"=>2, "three"=>3);
echo $a["one"].'<br>';
echo $a["two"].'<br>';
echo $a["three"].'<br>';
//$key=>$value 指键值对应的值
foreach($a as $key => $value){
echo "The \$key is: $key, The \$value is: $value<br>";
}
?>